that's the right formula though I'm curious how you figured 85% VE. If you only plan to spin it 5500 max rpm, the 575 will be big enough even with 100%VE.

My shortcut of cid*2 I use for a motor spinning to 6900 (~3456*2,VE=100%) I use this for extra slop so I'm sure I won't be starving at high revs.... at 5500 you'll be fine with the 575.