77 facing 10 BB shove from hijack in 24+2 45 man

[emeraldice]

I have 12k, hijack has 10k. Everyone else is close to 12k.
7 people left, 6 pay. BB is 1200.
Hijack shoves his 10k; It is folded to me on button w/ 77.
basically, is iso shove standard here or because of payout structure of 45 mans is it a fold?
FWIW hijack had been playing relatively tight