Party 55s - 99 on the bubble vs big stack

[murfnyc]

Party Poker No-Limit Hold'em Tourney, Big Blind is t150 (4 handed) converter

Button (t2130)
Hero (t3247)
BB (t3553)
UTG (t1070)

Preflop: Hero is SB with 9[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t425</font>, <font color="#CC3333">BB raises to t700</font>, Hero ???

I had a hard time deciphering the min-raise. Does it mean very strong or is it a weak-resteal attempt on the bubble?