Personally, I'm not folding here with only 7.5 BBs and a fairly decent chance to double up/increase my stack size.
Even given the PF action before you, an even shorter stack is jamming pre. If we a fairly conservative range of pairs, all Ax combos, and all broadway combos, A3s still has ~43% equity preflop if we go heads up.
Even if we give villain a tighter range of pairs, A2s+, A10o+, suited broadway, you still have ~38% equity heads up.
Obv, equity goes down if it goes multiway, but that's risk I'm willing to take here as a severe short stack. This is a matter of opinion though and i understand the argument of 'waiting for a better spot'. However, (again personally) I'd rather take these risks at potentially lower preflop equity but i can earn more BBs than having higher equity for less value. What good is waiting for that better spot when your stack is down to 2 BBs?
25% equity to double to 15 BBs > 80% equity to double up to 4 BBs. All day, everyday.
Finally, it's a freeroll. Its ok to take risks, especially at no cost to you.