Hero determines if villain has anything other than 8x more than 22% of the time. If so you call, if not, you fold.
This is close. His flush draw range is unlikely given the SB's comment, which makes 8x his most likely holding by far. But since he only needs to have a strangely played air, 2 pair, a set, an overpair, 44, or the rare other flush draw less than 1 in 4 times to make the call correct it is still tempting to call.