I had the same call. It was for a 3 night stay somewhere in Mexico. You have to do a survey but they bleep out how long it will be and they don't say who they are.
Definitely a scam. The number just called me and it plays tropical music while stating that a ten question survey will earn you a Cancun vacation. The option is given to press 1 and begin and then there is some whisper that is hard to make out about pressing 3 by a woman's voice under the music still being played. I just hung up. Damn Cancun would be nice.