Bubble preflop play

[Luke]

Party 30+3 - 4 players left

Hero (UTG): 1550
Button: 2900
SB: 1300
BB: 2250

Blinds are 100/200

The entire table's been playing fairly tightly since we were down to 5 people and I've been doing a bit more than my fair share of stealing.

Also, I have not been looked up on any of my steal attempts.

I'm dealt A7o. Fold or push?

If your answer for A7o is not a close one, let me know some hands that start to make this a close decision.

Thanks,

Luke