Can I cancel an item that I purchased that is on backorder?

I recently just bought a dildo, but now once my items were ready to ship it says the one I purchased has not shipped because it is on backorder. I ordered two other products along with it that have shipped which is fine. But I don't want to wait 2-3 weeks for the dildo. Can I just cancel the dildo because it hasn't even been sent out or processed yet?