I don't think it's actually KPCC. I think it's scammers using their name to get money out of you. I've never donated to them so there's no reason for them to have my number. And that's not how public radio stations do their pledge drives. If it were they would turn people off and not get as many donations.
Pretty sure it on behalf of the LA Phil, calling to sell you season tickets. I made the mistake of going to the LA Phil ONE TIME and about twice a year I get these calls.