$55 short stacked on bubble, make a stand with A7?

[splashpot]

Party Poker No-Limit Hold'em Tourney, Big Blind is t300 (4 handed) FTR converter on zerodivide.cx

Hero (t915)
BB (t4670)
UTG (t2710)
Button (t1705)

Preflop: Hero is SB with 7[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
UTG is all in(2710)<font color="#666666">1 fold</font>, Hero calls?

I have to do something soon. If I fold this, I'll have pretty much zero fold equity for the next orbit.