Receiving a text containing "Ring ring" will set the ringtone volume to 100% and call your device.
If
New SMS received matches search
This Trigger fires every time you receive an SMS on your Android device that matches a search you specify.
And
Call my device
This action will call your device with the IFTTT app installed and speak a message provided by your Applet.
Discover more time saving integrations for Android SMS and Android Device