I'm sorry I just don't know. I don't know what the signature of your device is, and thus how to change anything to match it.
If you did avrdude with the -v option you might find the signature.
I don't have a Pro Mini running at 3.3V, and judging by the lack of response, neither does anyone else who is on the forum right now.
I'm in a different time zone to you I guess. I just got out of bed, so pleas for help "in the next four hours" which arrive in my inbox at 4 am, don't have much effect on me. zzzzzzzzz