Who called from 6507578763

Guy called saying he was with the police donations, selling tickets to a children's performance in the "performing arts center."

Caller reached an automated attendant and then dialed to a specific extension, extension was not answered, caller hung up without leaving message

Called selling tickets repeatedly, no known productions of this kind posted anywhere.

no answer, although I picked it up on the 4th ring. wonder what scam is going on???