Hiding Port Address with DynDNS Host

I am presently using DynDNS to provide a human readable URL for my Transmission BitTorrent Remote Web interface. The IP address for my remote web interface would be http://89.126.127.***:9091 and my DynDNS address for it would by http://myhostname.dyndns.org:9091. I am wondering is there anyway to setup DynDNS to hide to Port number (the :9091 part of the address) of my address. So instead of going to http://myhostname.dyndns.org:9091 I could instead just go to http://myhostname.dyndns.org

I am a free user of DynDNS, maybe this is something that can be done as a paid user, or maybe not at all.