what owner and permissions on www/html folder

I recently installed vsftpd on my Ubuntu server 14.04. I'm now trying to use filezilla to transfer files to my www/html folder but i get "550 permission denied". The permissions is currently set to 755, and the owner of the folder is root. I used this guide when configuring vsftpd: http://ift.tt/Wot5aW What should i do?