Online 50 person $10 buyin tournament. Final 4. Blinds/antes are 400/800/50.

Stacks are:
UTG- 1600
BTN- 750
SB (Hero)- 10,500
BB (fairly terrible laggy guy)- 51,000

Payouts are:
$200
$120
$ 80
$ 60

UTG and BTN fold to Hero who has KK. BB says in chat "[Hero] I will call u". With the two shorties being so short, I can easily fold my way into 2nd and then go heads up outchipped about 6-1.

If BB will call any 2 (I believe he will), this is a fold, right? If I have AA I would push 100%, but KK is so vulnerable to any ace. I don't have or know how to use ICM, but I suspect that it would be close... Thoughts?