$11, BB preflop: pot committed or not?

[The Bubbler]

I'm BB with trash, getting 1:2.5 odds to call shove from unknown button. What opening range can we give him?

Using SNGWiz, call is ok when btn opens 88% (edge 0.19), and exactly +0.00 EV when opening 70%. How close can I make this call, considering also that I'll be pot committed as SB in next hand?

Party Poker
No Limit Holdem Tournament
Blinds: t300/t600
8 players
Converter

Stack sizes:
UTG: t5260
UTG+1: t1310
MP1: t1300
MP2: t1080
CO: t4260
Button: t2360
SB: t2770
Hero: t1660

Pre-flop: (8 players) Hero is BB with 3[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/club.gif[/img]
5 folds, <font color="#cc0000">Button raises all-in t2360</font>, SB folds, <font color="#cc0000">Hero?</font>