The easiest method is to do
The downside to this easy method is that you're going to get an older version (looks like it'll be 1.10). Enabling the EPEL repositories may get you a more modern version. If you want a truly up-to-date version you'll need to compile your own version (by downloading the source code from wireshark.org, getting all the dependencies, and then building Wireshark).
Also see this question and answer.