As poll, I am thinking about a place/thing where each person can cast one vote for one choice between several choices. I used to say krei voĉdonujon, but it is not a common way to say it, and it refers to the container, not the event.
John Wells's dictionary suggests the following:
poll balot-i, -ado; ricevi (multajn, malmultajn) voĉojn; (opini-)sondado, enketo
I think the final pair of translations have the meaning you want, so either one of these could work:
There's the root balot- for election like polls which have a binding result to something.
If you only want to find out peoples opinion for your own interest, use the root enket-