I don't know the answer for sure, but Remi has stated in an earlier thread that the volumes are as is stated on the board. Futura 122 has 122 liters of volume.
Your question is valid since Starboard used "virtual volume" numbers a while back. My 2008 iS 111 has 108 liters (so I was told on this web-site), but after numerous complaints, I think Starboard has gone away from the "virtual volume" and are now pretty close to the actual volumes. The volumes of the earlier formula boards (5-7 years ago) were a lot different than actual volumes.
If you search the forum for "board volumes" or "virtual volumes", you may find a lot of information about the history of all of this.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.