you searched the device with the help of your router webpage?
if yes, can you connect a monitor to you pi? There should be a Volumio Logo displayed after the pi booted.
if no, try to find the ip with the help of your router´s webpage.
i write the image file with flashnul utility - and apears to work:
C:\Users\carlos.santos\Downloads\flashnul-1rc1\flashnul-1rc1>flashnul F: -L Volumio1.55PIII.img
GetFreeDiskSpaceEx() failed: Access is denied.
Disk F: (UNC name: \.\F:)
------------------------------------------------------------[Drive geometry]–
Cylinders/heads/sectors = 480/255/63
Bytes per sector = 512
CHS size = 3948134400 (3765 Mb)
---------------------------------------------------------------[Device size]–
Device size = 3951034368 (3768 Mb)
delta to near power of 2 = 343932928 (328 Mb), 8%
-----------------------------------------------[Adapter & Device properties]–
Bus type = (7) USB
Removable device = Yes
Command Queue = Unsupported
Device vendor = Multiple
Device name = Card Reader
Revision = 1.00
Device serial = Å♣fc3d
--------------------------------------------------------------[Hotplug info]–
Device hotplug = Yes
Media hotplug = No
Selected operation: load file content
Selected drive: F:, 3951034368b (3768 Mb)
THIS OPERATION IS DESTRUCTIVE!!!
Type 'yes' to confirm operation. All other text will stop it.
Really destroy data on drive F:? :yes
-----------------------------------------------------------------------[Log]–
Runing operation [load file content] for drive F:
Pinging volumio [192.168.1.116] with 32 bytes of data:
Reply from 192.168.1.116: bytes=32 time=8ms TTL=64
Reply from 192.168.1.116: bytes=32 time=8ms TTL=64
Reply from 192.168.1.116: bytes=32 time=9ms TTL=64
Reply from 192.168.1.116: bytes=32 time=45ms TTL=64
Ping statistics for 192.168.1.116:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 8ms, Maximum = 45ms, Average = 17ms