Depends on how long you want to hold it in there for.
This is enough $ to put into a Vanguard fund rather than a TD Series, as the $10 trading fee is tiny compared to $7500, but huge compared to $200 per month contributions where e-series makes sense. If you plan to drip in the money or add small amounts each month, look at the e-series funds.
Guideline-- (There are TD E-series equivalents of all of these that has a slightly higher MER but still low)
If you have 10 or more years, I would look at equity ETFs, like a Total Stock Market fund. (VUN, VSX, or even VCN)
If you have less than 5 years, then put it into something conservative, like VAB (bond fund).
In between -- set up half and half.