Pokerstars $22 Bubble-Ok to push this?

[nhsir]

We were 4-handed at the 100/200/25 level. Stacks were as follows:

CO - 700
Butt - 8900
SB - 1100
Hero - 2800

CO folds, button raises to 600, SB folds, hero pushes with AKo.

We had been on the bubble for more than 20 minutes. The two short stacks were trying to outlast one another. Not suprisingly the bubble was raising a lot, although not as much as I would have given the circumstances. He had also made some pretty loose calls. I thought this was ok to push, but wasn't sure with the two short stacks.